X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Fhw%2Fvirtio%2Fvirtio-bus.c;fp=qemu%2Fhw%2Fvirtio%2Fvirtio-bus.c;h=febda76b94c32d47b4fd345600dfc25247e59ae1;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/hw/virtio/virtio-bus.c b/qemu/hw/virtio/virtio-bus.c
new file mode 100644
index 000000000..febda76b9
--- /dev/null
+++ b/qemu/hw/virtio/virtio-bus.c
@@ -0,0 +1,178 @@
+/*
+ * VirtioBus
+ *
+ *  Copyright (C) 2012 : GreenSocs Ltd
+ *      http://www.greensocs.com/ , email: info@greensocs.com
+ *
+ *  Developed by :
+ *  Frederic Konrad   <fred.konrad@greensocs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "hw/hw.h"
+#include "qemu/error-report.h"
+#include "hw/qdev.h"
+#include "hw/virtio/virtio-bus.h"
+#include "hw/virtio/virtio.h"
+
+/* #define DEBUG_VIRTIO_BUS */
+
+#ifdef DEBUG_VIRTIO_BUS
+#define DPRINTF(fmt, ...) \
+do { printf("virtio_bus: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) do { } while (0)
+#endif
+
+/* A VirtIODevice is being plugged */
+void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp)
+{
+    DeviceState *qdev = DEVICE(vdev);
+    BusState *qbus = BUS(qdev_get_parent_bus(qdev));
+    VirtioBusState *bus = VIRTIO_BUS(qbus);
+    VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
+    VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
+
+    DPRINTF("%s: plug device.\n", qbus->name);
+
+    if (klass->device_plugged != NULL) {
+        klass->device_plugged(qbus->parent, errp);
+    }
+
+    /* Get the features of the plugged device. */
+    assert(vdc->get_features != NULL);
+    vdev->host_features = vdc->get_features(vdev, vdev->host_features,
+                                            errp);
+}
+
+/* Reset the virtio_bus */
+void virtio_bus_reset(VirtioBusState *bus)
+{
+    VirtIODevice *vdev = virtio_bus_get_device(bus);
+
+    DPRINTF("%s: reset device.\n", BUS(bus)->name);
+    if (vdev != NULL) {
+        virtio_reset(vdev);
+    }
+}
+
+/* A VirtIODevice is being unplugged */
+void virtio_bus_device_unplugged(VirtIODevice *vdev)
+{
+    DeviceState *qdev = DEVICE(vdev);
+    BusState *qbus = BUS(qdev_get_parent_bus(qdev));
+    VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(qbus);
+
+    DPRINTF("%s: remove device.\n", qbus->name);
+
+    if (vdev != NULL) {
+        if (klass->device_unplugged != NULL) {
+            klass->device_unplugged(qbus->parent);
+        }
+    }
+}
+
+/* Get the device id of the plugged device. */
+uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus)
+{
+    VirtIODevice *vdev = virtio_bus_get_device(bus);
+    assert(vdev != NULL);
+    return vdev->device_id;
+}
+
+/* Get the config_len field of the plugged device. */
+size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus)
+{
+    VirtIODevice *vdev = virtio_bus_get_device(bus);
+    assert(vdev != NULL);
+    return vdev->config_len;
+}
+
+/* Get bad features of the plugged device. */
+uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus)
+{
+    VirtIODevice *vdev = virtio_bus_get_device(bus);
+    VirtioDeviceClass *k;
+
+    assert(vdev != NULL);
+    k = VIRTIO_DEVICE_GET_CLASS(vdev);
+    if (k->bad_features != NULL) {
+        return k->bad_features(vdev);
+    } else {
+        return 0;
+    }
+}
+
+/* Get config of the plugged device. */
+void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config)
+{
+    VirtIODevice *vdev = virtio_bus_get_device(bus);
+    VirtioDeviceClass *k;
+
+    assert(vdev != NULL);
+    k = VIRTIO_DEVICE_GET_CLASS(vdev);
+    if (k->get_config != NULL) {
+        k->get_config(vdev, config);
+    }
+}
+
+/* Set config of the plugged device. */
+void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config)
+{
+    VirtIODevice *vdev = virtio_bus_get_device(bus);
+    VirtioDeviceClass *k;
+
+    assert(vdev != NULL);
+    k = VIRTIO_DEVICE_GET_CLASS(vdev);
+    if (k->set_config != NULL) {
+        k->set_config(vdev, config);
+    }
+}
+
+static char *virtio_bus_get_dev_path(DeviceState *dev)
+{
+    BusState *bus = qdev_get_parent_bus(dev);
+    DeviceState *proxy = DEVICE(bus->parent);
+    return qdev_get_dev_path(proxy);
+}
+
+static char *virtio_bus_get_fw_dev_path(DeviceState *dev)
+{
+    return NULL;
+}
+
+static void virtio_bus_class_init(ObjectClass *klass, void *data)
+{
+    BusClass *bus_class = BUS_CLASS(klass);
+    bus_class->get_dev_path = virtio_bus_get_dev_path;
+    bus_class->get_fw_dev_path = virtio_bus_get_fw_dev_path;
+}
+
+static const TypeInfo virtio_bus_info = {
+    .name = TYPE_VIRTIO_BUS,
+    .parent = TYPE_BUS,
+    .instance_size = sizeof(VirtioBusState),
+    .abstract = true,
+    .class_size = sizeof(VirtioBusClass),
+    .class_init = virtio_bus_class_init
+};
+
+static void virtio_register_types(void)
+{
+    type_register_static(&virtio_bus_info);
+}
+
+type_init(virtio_register_types)